he was hosted by vice president biden. vice president biden also went to china. he had previously studied, as chris said, in the united states. li keqiang also has met regularly with visiting american other officials. and probably -- i don't know of another chinese official who's had as much in-depth experience with international diplomacy who has ascended -- on the economic side, albeit -- but who has now risen to such a high position. so these are people that know the world and we've had some interactions with. >> explain to us this whole business of a pivot because, as i understand it, the chinese have one idea of it and we have kind of a different idea of it. what is this pivot? >> well, look, you know, the united states has always been deeply engaged in asia. for decades we have maintained strong security alliances. we have had a key role in working with china as china came out of the cultural revolution. we have worked, basically from japan to australia, in deepening relationships for decades. i think the case has been that over the course of the last decad